A & A Consultants Inc.

Big Beaver Bridge Pennsylvania, United States

Admin_Ehaab — Thu, 27 Feb 2025 14:04:35 +0000

The project involves the total reconstruction and widening of two miles of the Turnpike’s east-west mainline (Interstate 76) between Milepost 12 and Milepost 14. Upon completion of this project, the existing four-lane facility will be upgraded to include six 12′ travel lanes, three eastbound and three westbound, 12′ shoulders and 10′ medians in each direction. To accommodate the new six lane facility, four early action bridges including two overhead Norfolk Southern railroad bridges were replaced prior to the start the reconstruction of the mainline Turnpike. To date all early action projects have been completed. Construction of the mainline Turnpike and the bridges of the Beaver River are currently in progress with an expected completion date of September 2027.

Freddie Mac Construction Management and Load Rating McLean, Virginia, United States

Admin_Ehaab — Thu, 27 Feb 2025 13:57:57 +0000

The bridge consists of two inclined towers and cabled stayed span of 160’-0”. The free span is over Jones Branch Dr. in McLean, VA. The cables are anchored into the back of the inclined pylons. The inclined pylons are constructed with12000 ksi concrete and supported on drilled shafts foundation

CKI was responsible of the construction management of the bridge and periodic safety inspection , rating and evaluation.

South Capitol Bridge Project Structural Analysis and Load Rating Washington D.C.

Admin_Ehaab — Thu, 27 Feb 2025 13:54:23 +0000

A&A Consultants, Inc. performed Structural Analysis and Load Rating using Allowable Stress Design method, PennDOT’s BAR7 program, and STAAD software. Completed the structural design of demolition through phases of construction, design of temporary decking and “false work” as required to maintain constant consistent traffic flow throughout the construction of new bridges for the heavy traffic areas.

Analysis of various options of temporary deck. FRP bridge deck, L.B. Foster Deck, and Concrete with stay-in-place form deck. These three types of decks were evaluated from cost-effectiveness and the required strength of the girders. Strengthening of existing girders were designed.

A&A Consultants, Inc. also performed Structural Analysis and Load Rating using Allowable Stress Design method, PennDOT’s BAR7 program, and STAAD software; completed the structural design of demolition through phases of construction, design of temporary decking and “false work”, and analyzed various options of temporary bridge decks. The three types of decks were evaluated from cost- effectiveness and the required strength of the girders. Strengthening of existing girders were designed, as necessary.

West Busway

Admin_Ehaab — Thu, 16 Jan 2025 13:18:09 +0000

A & A provided construction management services on the Port Authority of Allegheny

County’s West Busway project, which consisted of eight miles of roadway from downtown Pittsburgh to the northwestern suburbs.

This highlly complex project included rehabilitation of two existing railroad tunnels – the Wabash Tunnel and the Berry Street Tunnel, and construction of six busway stations with both inbound and outbound platforms.

Lawrence Convention Center

Admin_Ehaab — Thu, 16 Jan 2025 13:15:41 +0000

A&A provided construction managment services for this 1,500,00-square foot convention, conference and exhibition building along the banks of the Allegheny River in Pittsburgh, Pennsylvania.

In 2003 the bulding was awarded Gold Leadership in Energy and Environmental Design (LEED) certification by the U.S. Green Building Council, making it the first such convention center in the U.S., and the largest “green” building in the world.

Three Sisters Bridges

Admin_Ehaab — Thu, 16 Jan 2025 13:14:15 +0000

Sixth, Seventh and Ninth Street Bridges are located just north of Pittsburgh, crossing over the Allegheny River. These three bridges are owned by the Allegheny County Department of Public Works. The project includes rehabilitation of three self anchored suspension bridges.

A&A is responsible for the structural analysis of the three suspension bridges including load ratings.

Dongola Bridge

Admin_Ehaab — Thu, 16 Jan 2025 13:11:21 +0000

Dongola Bridge is one of the major projects ubdertaken by Ministry of Dams and Bridges to develop the northern regions of Sudan. The bridge will act as an
important link within the roads network starting at Port Sudan on the Red Sea Coast passing through El Sileim across the Nile from Dongola and extending northwards to the Wadi Halfa area near the border with Egypt and connecting to Shiryan Al Shamal Highway leading to Omdurman.

ENGINEERING DATA
Bridge length: 696 m
Bridge width: 20.6 m 2 lanes in each direction with pedestrian passage ways.
Number of Spans: 17

Type of Construction
Superstructure: Prestressed Concrete girders with cast-in-place reinforced concrete deck
Substructure: Bored reinforced concrete piles supporting 3 column piers.

Light Rail Transit

Admin_Ehaab — Thu, 16 Jan 2025 13:10:29 +0000

A & A provided construction management services on the Port Authority of Allegheny
County’s West Busway project, which consisted of eight miles of roadway from downtown Pittsburgh to the northwestern suburbs.

Waterplant

Admin_Ehaab — Thu, 16 Jan 2025 13:04:25 +0000

The Company is implementing civil works for the water plant project in Omdurman City over the River Nile. This is a vital project necessary for the province of Omdurman as a solution to the region’s water problems. The plant will resolve this problem by providing large quantities of clean drinking water for the city.

The project consists of four main tanks for water purification with a total water pumping capacity equal to 200,000 cubic meters/hour

SR28

Admin_Ehaab — Thu, 16 Jan 2025 13:03:18 +0000

This project involved the design of a directional ramp from S.R. 28 Southbound near the Heinz Plant to I-279 Southbound. The concept eliminated the need for three traffic lights by realigning two lanes to pass under the railroad structure to tie-in with I-279 Southbound. This resolved the level of service issues as well.

Design:

The design includes a simple span structure from SR. 28 over Madison Avenue Connector and a two-span curved girder structure over I-279 and the I-279 HOV lane (under I-579).

Services:

Our services included geotechnical, hydrology/hydraulics (H&H) , roadway, and structural engineering. Our innovative approach to alternate fill material allowed us to use shredded tires as fill materials. The benefits of using “tire shreds” for embankment fill are that they provide an environmentally sound method of disposing of a persistent waste product and support “Green Design” principles. This project demonstrated that waste tires can be disposed of safely and economically. Additionally, the superstructure was utilized from existing material at a department stockpile, allowing the span length to increase, thus allowing abutments to be shortened in height and allowing the district to appreciate substantial costs.

Award:

A&A was awarded the 2009 ASHE Pittsburgh Outstanding Highway Engineering Award for this project.